Macbook to Samsung via S-Video help?

I recently purchased a 22 inch Samsung LCDtv with a 1680 x 1050 pixel resolution and I've connected my macbook to it via the S-video adapter. Being new to this, I have no idea what I should change the display's resolution to. I've tried different settings, but they all seem to be pretty unclear and distorted.

If anyone knows what I'm doing wrong or has advice to get a more clear picture please inform me!

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